Synthesis of 2,2'-Bipyridines Bearing Amino or Carboxyl Group at the Side Chain and Physical Properties of Their Ruthenium(II) Complexes
摘要:
The synthesis of unsymmetrical 2,2'-bipyridines, in which one pyridine ring of bipyridine is linked to the amino or carboxyl group through the alkyl chain as the side chain became possible by the regioselective O-alkylation of pyridyl-2( 1H)-pyridinones. Synthetic tris(bipyridine)ruthenium(II) showed characteristic metal-to-ligand charge transfer (MLCT) bands at around 480 nm. The standard redox potentials of new [Ru(bpy)(3)](2+) were about 200 mV lower than that of the parent [Ru(bpy)(3)](2+). The p-substituent effect of the benzene ring upon the redox potential was observed.
An efficient synthesis of 4-phenoxy-quinazoline, 2-phenoxy-quinoxaline, and 2-phenoxy-pyridine derivatives using aryne chemistry
作者:Mahesh K. Zilla、Sheena Mahajan、Rajni Khajuria、Vivek K. Gupta、Kamal K. Kapoor、Asif Ali
DOI:10.1039/d0ra09994e
日期:——
Herein we report the mild and efficient synthesis of 4-phenoxyquinazoline, 2-phenoxyquinoxaline, and 2-phenoxypyridine derivatives from the starting materials viz. quinazolin-4(3H)-one, quinoxalin-2(1H)-one, and pyridin-2(1H)-one and aryne generated in situ from 2-(trimethylsilyl)phenyl trifluoromethanesulfonate and cesium fluoride. This synthetic methodology gives a new environmentally benign way
在这里,我们报告了从起始材料即4-苯氧基喹唑啉、2-苯氧基喹喔啉和 2-苯氧基吡啶衍生物的温和有效合成。quinazolin-4(3 H )-one、quinoxalin-2(1 H )-one、pyridin-2(1 H )-one 和芳烃由 2-(三甲基甲硅烷基)苯基三氟甲磺酸盐和氟化铯原位生成。该合成方法为制备几种非天然系列的 4-苯氧基喹唑啉、2-苯氧基喹喔啉和 2-苯氧基吡啶化合物提供了一种新的环保方法,其收率高,底物范围广。
METAL COMPLEXES
申请人:Merck Patent GmbH
公开号:US20210111345A1
公开(公告)日:2021-04-15
The present invention relates to binuclear, trinuclear and tetranuclear metal complexes and to electronic devices, especially organic electroluminescent devices, comprising these metal complexes.